SU273484A1 - METHOD FOR DETERMINING THE TEMPER.LTURNYE FACTOR OF VOLUME EXTENSION OF MATERIALS - Google Patents
METHOD FOR DETERMINING THE TEMPER.LTURNYE FACTOR OF VOLUME EXTENSION OF MATERIALSInfo
- Publication number
- SU273484A1 SU273484A1 SU1316434A SU1316434A SU273484A1 SU 273484 A1 SU273484 A1 SU 273484A1 SU 1316434 A SU1316434 A SU 1316434A SU 1316434 A SU1316434 A SU 1316434A SU 273484 A1 SU273484 A1 SU 273484A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- materials
- determining
- lturnye
- temper
- factor
- Prior art date
Links
- 238000000034 method Methods 0.000 title description 8
- 238000010438 heat treatment Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 2
- 238000000844 transformation Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 1
Description
Насто щее изобретение относитс к области дилатометрических исследований материалов .The present invention relates to the field of dilatometric studies of materials.
Известны способы ОПределени температурного коэффициента объемного расширени материалов путем одновременного нагрева исследуемого и эталонного образцов и сравнени их объемов.Methods are known for determining the temperature coefficient of volume expansion of materials by simultaneously heating the test and reference samples and comparing their volumes.
Такие способы предусматривают измерение и регистрацию разности изменений объема эталонного и исследуемого объектов, помещенных в термостат, т. е. обогреваемы.х с одинаковой скоростью или выдерживаемых при одинаковой температуре.Such methods include measuring and recording the difference in changes in the volume of the reference and test objects placed in a thermostat, i.e., heated at the same speed or maintained at the same temperature.
Однако при иззчении истинных изменений объема в ходе процессов, св занных с нарушением термодинамического равновеси , точность таких способов недостаточна, так как в исследуемом образце происходит выделение или поглощение тепла, например, за счет фазовых превращений. Поэтому возникает необходимость определени и расчетного введени различного рода поправок. Дл определени же поправок на расширение образца за счет нагрева экзотермическим теплом необходимо экспериментально измерить и учесть тепловой эффект фазовых превращений.However, when studying true volume changes during the processes associated with the violation of thermodynamic equilibrium, the accuracy of such methods is insufficient, since heat is released or absorbed in the sample under study, for example, due to phase transformations. Therefore, it is necessary to determine and calculate the introduction of various kinds of amendments. In order to determine the corrections for the expansion of the sample due to heating by exothermic heat, it is necessary to measure experimentally and take into account the thermal effect of phase transformations.
По предлагаемому способу, с целью повышени точности определени при переменном теплосодержании материала, образцы нагревают независимо управл емыми источниками тепла п поддерживают между образцами нулевую разность температур. Это обеспечивает возможность получени истинной величины распределени по времени или температуре изменений объема в ходе процессов, сопровождающихс тепловым эффектом.According to the proposed method, in order to increase the determination accuracy with variable heat content of the material, the samples are heated independently by controlled heat sources and n is maintained between the samples a zero temperature difference. This provides the possibility of obtaining the true magnitude of the distribution over time or temperature of changes in volume during processes accompanied by a thermal effect.
Предмет изобретени Subject invention
Способ определени температурного коэффициента объемного расширени материалов путем одновременного нагрева исследуемого и эталонного образцов и сравнени их объемов , отличающийс тем, что, с целью повышени точности определени при переменном теплосодержании материала, образцы нагревают независимо управл емыми источниками тепла и поддерлшвают между образцами нулевую разность температур.The method of determining the temperature coefficient of volumetric expansion of materials by simultaneously heating the test and reference samples and comparing their volumes, characterized in that, in order to increase the accuracy of determination with variable heat content of the material, the samples are heated by independently controlled heat sources and maintain a zero temperature difference between the samples.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU273484A1 true SU273484A1 (en) |
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